Caused by: java.lang.IllegalStateException: No ServletContext set at org.springframework.util.Assert.state()

Troubleshooting “No ServletContext set” Error in Spring Boot The error message Caused by: java.lang.IllegalStateException: No ServletContext set generally indicates that the Spring application context is not fully initialized, or you’re trying to use web-specific features in a non-web environment. Common Scenarios and Solutions Incorrect Test Annotations If you’re facing this issue during testing, make sure … Read more

EntityManager vs SessionFactory

EntityManager vs SessionFactory: A Comparison Both EntityManager and SessionFactory are used in Java-based applications for database interactions, but they come from different specifications and have different use-cases and features. Origin: EntityManager: Part of the Java Persistence API (JPA), which is a specification for object-relational mapping in Java. SessionFactory: Part of Hibernate, which is an object-relational … Read more

Pictory: A New Approach to Learning Programming Languages

In the realm of education, particularly in the domain of programming languages, the traditional methods of learning through textbooks and lectures are rapidly evolving. Visual content, especially videos, has emerged as a powerful tool to enhance the learning experience. Recognizing this shift, Pictory offers a unique approach to mastering programming languages. What is Pictory? Pictory … Read more

Supercharge Your Writing with Jenni AI

Jenni AI is a powerful tool designed to enhance the research and writing capabilities of academics and professionals. Here’s a comprehensive overview of what Jenni AI offers: Key Features: AI Autocomplete: This feature assists users in overcoming writer’s block by providing real-time writing suggestions. In-text Citations: Jenni AI can consult the latest research and any … Read more

Exploring JDK 20.0.1

In the ever-evolving landscape of Java Development Kit (JDK), JDK 20.0.1 has brought forth a range of crucial updates, addressing issues and introducing new functionalities. This article will dive into the significant changes in this release, offering a comprehensive overview for developers and users alike. Restoring Missing /usr/java/default Symlink on Linux (JDK-8306690) One of the … Read more

Duplicate class kotlin.collections.jdk8.CollectionsJDK8Kt found in modules jetified-kotlin-stdlib-1.8.0 (org.jetbrains.kotlin:kotlin-stdlib:1.8.0) and jetified-kotlin-stdlib-jdk8-1.6.0

This error occurs when you have two or more dependencies in your project that contain the same class, in this case, kotlin.collections.jdk8.CollectionsJDK8Kt. The specific dependencies causing the issue are org.jetbrains.kotlin:kotlin-stdlib:1.8.0 and org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.6.0. These dependencies have overlapping classes, causing a conflict in the build process. To resolve the issue, you should use only one version of … Read more

Sniffing Out Code Smells in Java: Detection and Remedies

Code smells are indicators of potential problems in your code. They are not bugs, but rather symptoms of poor design and implementation choices that may lead to increased technical debt and difficulties in maintaining and extending the code in the future. This article will discuss common code smells in Java, how to detect them, and … Read more

java.lang.IllegalArgumentException: Malformed \uxxxx

The java.lang.IllegalArgumentException: Malformed \uxxxx error occurs when there’s an invalid Unicode escape sequence in your Java code or a properties file. A Unicode escape sequence starts with \u followed by exactly four hexadecimal digits (0-9, A-F, or a-f). To resolve this issue, you need to identify the malformed Unicode escape sequence in your code or … Read more

A Guide to Learning and Resources

Java, a powerful and versatile programming language, has been at the forefront of the tech industry since its inception in the mid-90s. As a highly popular language, Java is often the first choice for developers building scalable and maintainable applications. Whether you are a novice programmer or an experienced developer looking to learn a new … Read more

module java.base does not “opens” to unnamed module

The error “module java.base does not ‘opens’ to unnamed module” occurs when you are using Java Platform Module System (JPMS) and your code (or a third-party library) tries to access a non-public member of the package from an unnamed module. This access is not allowed by default due to stronger encapsulation enforced by … Read more